The graduation ceremony of the United States Army's Ranger School at Fort Benning, Georgia. (Jessica McGowan/Getty Images)

Major Lisa Jaster is the third woman to graduate from the elite Army Ranger School since the school opened up its course to women in April this year. The 37-year old engineer and mother of two kids, aged 7 and 3, is joining the ranks of fellow West Point graduates Captain Kristen Griest, 26, and First Lieutenant Shaye Haver, 25, who graduated in August. Jaster will receive her Ranger Tab at a graduation ceremony in Fort Stewart, Georgia on Friday. Army Ranger School is the Army’s “premier combat leadership course,” a gruelling 62-day course aimed at preparing soldiers for small unit combat operations under heavy physical and mental pressure. While the course was originally intended as a one-time test to see how women could be integrated into all combat units, after Griest and Haver’s graduation, it was announced that the School would from now on be open to all genders.